Add project version check via git

include/config.h

@@ -336,6 +336,7 @@ public:
         this->unusedTileCovered = 0x0000;
         this->unusedTileSplit = 0x0000;
         this->maxEventsPerGroup = 255;
+        this->forcedMajorVersion = 0;
         this->identifiers.clear();
         this->readKeys.clear();
     }
@@ -406,6 +407,7 @@ public:
     int collisionSheetHeight;
     QList<uint32_t> warpBehaviors;
     int maxEventsPerGroup;
+    int forcedMajorVersion;
 
 protected:
     virtual QString getConfigFilepath() override;

include/mainwindow.h

@@ -355,7 +355,7 @@ private:
     void refreshCollisionSelector();
     void setLayoutOnlyMode(bool layoutOnly);
 
-    bool checkProjectSanity();
+    bool isInvalidProject(Project *project);
     bool loadProjectData();
     bool setProjectUI();
     void clearProjectUI();

include/project.h

@@ -87,6 +87,7 @@ public:
     void clearHealLocations();
 
     bool sanityCheck();
+    int getSupportedMajorVersion(QString *errorOut = nullptr);
     bool load();
 
     Map* loadMap(const QString &mapName);